Brave is great but slow to load. When I double-click the desktop icon it is several seconds before I see any activity. It takes 5 seconds to load the GUI on my Win 10 Xeon E5-1650 v2 @ 3.5GHz and is much slower on my old tablet. I sometimes think that it has not started and double-click the icon again so that I end up with two instances.
Obviously the program needs to do stuff behind the scenes before it can paint the GUI.
So that the user has some feedback that his/her request to start the app has started could you display something (anything) on screen. Maybe show the Brave logo in a dialog with clear background.